Quick OpenStack Server Create with ruby Fog

quick_vm.rb

#!/usr/bin/env ruby
# 
# Before we start, make sure you have Essex support in Fog
#
# Essex support has not been merged into upstream Fog so you'll need
# a custom ruby fog build to run through the examples
#
require 'fog'
require 'pp'
require 'highline/import'
require 'colored'

%w{OS_PASSWORD OS_USERNAME OS_AUTH_URL_FOG}.each do |env|
  if ENV[env].nil?
    $stderr.puts "Missing #{env} environment variable."
    exit 1
  end
end

# Connect and authenticate
#
conn = Fog::Compute.new({
  :provider => 'OpenStack',
  :openstack_api_key => ENV['OS_PASSWORD'],
  :openstack_username => ENV["OS_USERNAME"],
  :openstack_auth_url => ENV["OS_AUTH_URL_FOG"],
  :openstack_tenant => ENV["OS_USERNAME"]
  #:connection_options => { :ssl_verify_peer => false }
})

# Find the server flavor we want.
# m1.tiny has 512 MB of RAM and no additional ephemeral storage
#
flavor = conn.flavors.find { |f| f.name == 'm1.tiny' }

# Find the image we want
#
if ARGV[0]
  image_name = ARGV[0]
else
  image_name = ask("Image?".bold.magenta + " ") { |q| q.default = 'ubuntu-precise-amd64' }
end
image = conn.images.find { |i| i.name == image_name }
if image.nil?
  $stderr.puts "Image #{image_name} not found. Aborting."
  exit 1
end

# Create the server
# FIXME: raises an exception for some reason. Looks like it expects a public ip 
# associated
#server = conn.servers.bootstrap :name => "rubiojr-#{Time.now.strftime '%Y%m%d'}",
#                                :image_ref => image.id,
#                                :flavor_ref => flavor.id

# This is equivalent but better for faster async creation since waiting
# for ready? is optional
#
puts "#{'Creating server'.yellow} from image #{image.name}..."
server = conn.servers.create :name => "rubiojr-#{Time.now.strftime '%Y%m%d-%H%M%S'}",
                             :image_ref => image.id,
                             :flavor_ref => flavor.id,
                             :key_name => 'my-foo-keypair'
server.wait_for { ready? }

# Associate a public IP to the server
# Create if there are no floating ips available
#
ip = conn.addresses.find { |ip| ip.instance_id.nil? }
if ip.nil?
  puts "#{'Creating IP'.yellow}..."
  ip = conn.addresses.create
end
puts "#{'Associate IP'.yellow} #{ip.ip}..."
ip.server = server

puts "#{'Server:'.yellow} #{server.name} #{'IP:'.yellow} #{ip.ip}"

# Cleanup
#
#ip.destroy
#server.destroy